Ring Main Unit

30kv Gas Insulated Ring Main Unit (SF6)

Brand: HENGFENGYOU
Series: HXGN
USES: Medium voltage breaker
Country of origin: China
Terms of payment: L/C, T/T, Western Union, Paypal, Money Gram
Certification: ISO9001、CB、CE、KEMA

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30kv Gas Insulated Ring Main Unit (SF6) Overview

- The 30KV (SF6) gas Insulated ring main unit has the advantages of compact structure, fully enclosed, fully insulated layer, long service life, maintenance free, small indoor space occupation, reliability, and no harm to the working environment. It is widely used in industrial production and civil cable ring networks and power supply system tails. Very suitable for small and medium-sized secondary substations, switching stations, factories and mining enterprises, airports, railway lines, residential communities, multi-story buildings, highways, subway stations, tunnel construction and other industries.

- Standards: IEC60265, IEC60298, IEC60420, IEC60694, IEC60056, DIN47636 National industry standards: GB/T11022-1999, GB3906-2006, GB3804-2004, GB16926-2009. GB/T11023-1999, GB1984-2003, GB1985-2004, DL/T404-2007

30kv Gas Insulated Ring Main Unit (SF6) advantage

- The 30KV (SF6) gas Insulated ring main unit dust collector uses high-quality 2mm thick stainless steel plate casing.

- The stainless steel plate is cut and formed by fiber laser cutting, and welded by excellent welding robots worldwide, ensuring the sealing of the dust collector.

- Fill the gas box with SF6 vapor and undergo synchronous vacuum packaging for leak detection; The high-voltage load switch, grounding device power switch, circuit breaker insulation layer cylinder and other power switch themed movable components, as well as the bus duct, are sealed in a stainless steel plate air box. The waterproof level of the air hood is P67, and the dust collector is equipped with a glass diaphragm. When the internal pressure of the power switch exceeds a certain working pressure, it can be discharged from the explosion-proof port below, which can reasonably avoid harm to people, cables, and other switchgear in the distribution station.

30 kv gas Insulated ring main unit,30 kv rmu price

30 kv gas Insulated ring main unit,30 kv rmu price

30kv Gas Insulated Ring Main Unit (SF6) FAQ

What is the primary function of a 30kV Gas Insulated Ring Main Unit (RMU)?
It is designed for power distribution, providing reliable switching, protection, and isolation in medium-voltage networks, typically in urban or space-constrained areas.
What type of gas is used for insulation, and why?
SF6 (sulfur hexafluoride) gas is used due to its excellent dielectric strength and arc-quenching properties, ensuring compact and safe operation.
What are the key advantages of a gas-insulated RMU over air-insulated units?
Higher safety (reduced risk of fire), smaller footprint, better resistance to environmental conditions (dust, moisture), and lower maintenance needs.
What is the typical rated current and short-circuit withstand capacity?
Standard models offer 630A–1250A rated current and 20kA–25kA short-circuit withstand capacity (specifics depend on design).
How is SF6 gas leakage monitored in the RMU?
Integrated pressure sensors or density relays trigger alarms if gas pressure drops below safe thresholds, ensuring operational reliability.
Can the RMU be configured for automation and remote control?
Yes, options include motorized operation, SCADA integration, and IoT-enabled monitoring for smart grid applications.
What safety features are included to protect operators?
Hermetic sealing, grounded metal enclosures, and interlocking mechanisms prevent accidental contact with live parts.
What maintenance is required for an SF6-insulated RMU?
Periodic checks of gas pressure, contact resistance measurements, and visual inspections; SF6 gas handling requires certified procedures.
Is the unit suitable for outdoor installation?
Yes, corrosion-resistant enclosures (typically stainless steel or aluminum) and IP67-rated protection allow outdoor use in harsh environments.
How does the RMU handle fault conditions like short circuits?
Combined load-break and fault-make switches, along with overcurrent relays or fuses, isolate faults to minimize network disruption.